McQs in Optics and Refraction
This text comprises a selection of carefully chosen questions based on the Optics and Refraction module of the Royal College of Ophthalmologists examinations. For each of the 60 questions a short informative answer is supplied.
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20 dioptre lens accommodation angle alpha angle kappa angle of incidence anisometropia anterior chamber aperture aphakia astigmatism axis back vertex distance base curve Captoptric images chromatic aberration co-axial illumination compound microscopes concave lens contact lens correction convergence excess convergence excess esotropia convex lens crystalline lens cyclopentolate cylindrical decentering degrees deviation diffraction dioptre base-out prism dioptre base-up dioptre concave lens diplopia effective power enlarges the retinal equivalent esotropia F the image focal line Galilean telescope horizontal human eye hypermetropic image displacement incident ray indirect ophthalmoscopy intraocular lens Javal-Schiotz keratometer keratometry licence requires Maddox rod magnification microtropia myopes myopic astigmatism neutralised nodal point objective lens optical centre overcome phoropter pinhole posterior presbyopia principal meridians prism dioptre prism in front prismatic power produces an erect reading segment reduced refractive index retinal image retinoscopy retinoscopy reflex sclerotic scatter spectacle correction spectacle lenses SRK formula stereopsis toric trial frame visual acuity visual axes